cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A235617 Primes whose base-7 representation also is the base-4 representation of a prime.

Table of values

n a(n)
1 2
2 3
3 17
4 59
5 71
6 73
7 113
8 353
9 367
10 449
11 463
12 491
13 701
14 743
15 757
16 787
17 857
18 1039
19 1151
20 1193
21 2411
22 2423
23 2467
24 2551
25 2843
26 3109
27 3137
28 3209
29 3251
30 4817
31 4903
32 5209
33 5657
34 5839
35 5939
36 5953
37 7211
38 7603
39 7703
40 8009
41 8039
42 8291
43 8387
44 16831
45 16871
46 16927
47 17207
48 17321
49 17837
50 19211
51 19267
52 20261
53 20287
54 22123
55 22303

List of values

[2, 3, 17, 59, 71, 73, 113, 353, 367, 449, 463, 491, 701, 743, 757, 787, 857, 1039, 1151, 1193, 2411, 2423, 2467, 2551, 2843, 3109, 3137, 3209, 3251, 4817, 4903, 5209, 5657, 5839, 5939, 5953, 7211, 7603, 7703, 8009, 8039, 8291, 8387, 16831, 16871, 16927, 17207, 17321, 17837, 19211, 19267, 20261, 20287, 22123, 22303]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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